<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue/vue.js" charset="utf-8"></script>
    <script src="vue/vue-resource.js"> </script>

    <style>
        .gray{
            background-color: #ccc;
        }
    </style>

</head>
<body>

<div id="app">
    <input type="text" v-model="t1" @keyup="get($event)" @keydown.down="changeDown" @keydown.up.prevent="changeUp">
    <br>
        <ul>
            <li v-for="(value,index) in myData" :class="{gray:index==now}">{{value}}</li>
        </ul>
        <p v-show="myData.length==0">暂无数据...</p>
</div>

<script>
    new Vue({
        el:'#app',
        data:{
            myData:[],
            t1:'',
            now:-1
        },
        methods:{
            get:function (ev) {
                if(ev.keyCode==38 || ev.keyCode==40)return;
                if(ev.keyCode==13){
                    window.open('https://www.baidu.com/s?wd='+this.t1);
                    this.t1=""
                }
                this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su',{
                    params:{
                        wd:this.t1
                    },
                    jsonp:'cb'
                }).then(function (res) {
                    this.myData=res.data.s;
                },function () {
                })
            },
            changeDown:function () {
                this.now++
                if(this.now==this.myData.length)this.now=0;
                this.t1=this.myData[this.now]
            },
            changeUp:function () {
                this.now--;
                if(this.now==-1)this.now=this.myData.length-1;
                this.t1=this.myData[this.now];
            }
        }
    })
</script>

</body>
</html>